Enable libocl and disable the usage of the old huge header.

Enable libocl and disable the usage of the old huge header.

The llvm ir print out is modified.
From the OCL_OUTPUT_LLVM_BEFORE_EXTRA_PASS and
OCL_OUTPUT_LLVM, we change to
OCL_OUTPUT_LLVM_BEFORE_LINK
OCL_OUTPUT_LLVM_AFTER_LINK
OCL_OUTPUT_LLVM_AFTER_GEN
The first one print out the IR before link the bitcode lib.
The second one print out the IR result after linking.
Then last one print out the IR after gen translating.

Signed-off-by: Junyan He <junyan.he@linux.intel.com>
Reviewed-by: "Song, Ruiling" <ruiling.song@intel.com>